Container base



FIG. 1 is a top, front, side perspective view of the container base of my new invention;

FIG. 2 is a side elevational view, the opposing side elevational view being a mirror image thereof; and,

FIG. 3 is a bottom plan view thereof.

The broken lines shown in the drawings are for illustrative purposes only and form no part of the claimed design. 

I claim the ornamental design for a container base, as shown and described. 